Subwoofer



FIG. 1 is a perspective view of a subwoofer according to our novel design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a side view thereof, taken from the left of FIG. 4;

FIG. 6 is a side view thereof taken from the right of FIG. 4; and,

FIG. 7 is a rear view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a subwoofer, as shown and described. 